WIKIPEDIA:

“ Fermin Muguruza (born 20 April 1963 in Irun, Basque Country) is a Basque rock musician, singer, songwriter, producer, record label manager, and co-founder for the ska punk band Kortatu, active from 1983 to 1988, and for the crossover group Negu Gorriak, active from 1990 to 1996.
He is the brother of musicians Iñigo Muguruza and Jabier Muguruza and is one of the personalities interviewed for the documentary film The Basque Ball, released in 2003.

Music career and socio-political views
Muguruza has taken part in more than twenty albums, and is one of the most important artists from the Basque Country.
In 1983 he founded a fusion ska punk band called Kortatu with his brother Iñigo and drummer Treku Armendariz, among the first to popularise ska in Spain. They were clearly influenced by The Clash, in fact, Muguruza decided to create the band after seeing Strummer's band in a 1980 gig in Donostia. In 1988 the group disbanded, but Fermin and Iñigo would come together again in 1990 to create the crossover group Negu Gorriak, along with Kaki Arkarazo, who had produced Kortatu's last records.
In 1997 he collaborated with Dut. More recently he has developed a solo career, always defending the use of the [......] ”

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